CT
TPer Emeritus
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IanC_UK drew my attention to this thread over on The Bird Forum.
http://www.birdforum.net/showthread.php?p=1407014
It's well worth a read, but apparently a setting on the 50D - Auto Lighting Optimiser is enabled by default on new cameras and causes undue noise when used shooting RAW files. I've checked mine which is set at the lowest 'Standard' setting but I've now disabled it.
Highlight Tone Priority I've noticed, also causes a noise increase as it under-exposes to protect highlights and thus increases noise. i can imagine that with both ALO and HTP enabled it's highly likely to have an adverse effect on noise. Both settings it seems are intended for use when shooting jpegs - not RAW files. They're both now switched off on my 50D, so I'll see if there's a difference.
http://www.birdforum.net/showthread.php?p=1407014
It's well worth a read, but apparently a setting on the 50D - Auto Lighting Optimiser is enabled by default on new cameras and causes undue noise when used shooting RAW files. I've checked mine which is set at the lowest 'Standard' setting but I've now disabled it.
Highlight Tone Priority I've noticed, also causes a noise increase as it under-exposes to protect highlights and thus increases noise. i can imagine that with both ALO and HTP enabled it's highly likely to have an adverse effect on noise. Both settings it seems are intended for use when shooting jpegs - not RAW files. They're both now switched off on my 50D, so I'll see if there's a difference.